<div class="container">
    <div class="columns">
        <label class="option" for="allColumns"><input id="allColumns" type="checkbox" />All Columns</label>
        <div>
            <button onclick="onBtExport()" style="font-weight: bold;">Export to Excel</button>
        </div>
    </div>
    <div class="grid-wrapper">
        <div id="myGrid" class="ag-theme-quartz"></div>
    </div>
</div>